/*
 * Copyright 2012 GitHub Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package tk.djcrazy.MyCC98.util;

import android.accounts.Account;
import android.content.Context;
import android.util.Log;

/**
 * Loader that support throwing an exception when loading in the background
 * 
 * @param <D>
 */
public abstract class ThrowableLoader<D> extends AsyncLoader<D> {

	private static final String TAG = "ThrowableLoader";

	private final D data;

	private Exception exception;

	/**
	 * Create loader for context and seeded with initial data
	 * 
	 * @param context
	 * @param data
	 */
	public ThrowableLoader(Context context, D data) {
		super(context);

		this.data = data;
	}

	@Override
	public D loadInBackground() {
		exception = null;
		try {
			return loadData();
		} catch (Exception e2) {
			exception = e2;
		}
 		return data;
	}

 	/**
	 * @return exception
	 */
	public Exception getException() {
		return exception;
	}

	/**
	 * Clear the stored exception and return it
	 * 
	 * @return exception
	 */
	public Exception clearException() {
		final Exception throwable = exception;
		exception = null;
		return throwable;
	}

	/**
	 * Load data
	 * 
	 * @return data
	 * @throws Exception
	 */
	public abstract D loadData() throws Exception;
}
